Gear-case for dynamo-electric machines.



J. F. CURTIS. I GEAR CASE FOR DYNAMO ELECTRIC MACHINES.

APPLICATION FILED FEB.1, 1911.

Patented Oct 1, 1912.

WITNESSES:

' IN ENTOR BY Md ATTORNEY JAMES Ii. CURTIS, 0F PITTSBURGH,

PENNSYLVANIA, ASSIGNOR TO WES'IINGHOUSE ELECTRIC AND MANUFACTURING COMPANY,- A CCRPORATION OF PENNSYLVANIA.

GEAR-CASE FOR DYNAMO-ELEGTRIC MACHINES.

Specification of Letters Patent.

Patented Oct 1 191 5?.

Application filed February 1, 1911. Serial No. 606,430.

To all whom it may concern:

Be it known that I, JAMEs F. CURTIS, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Gear- Cases for Dynamo-Electric Machines, of which the following is a specification.

My invention relates to gear cases for dynamo-electric machines, and it has special reference to gear cases of the split type which are employed in connection with rallway motors.

The object of my invention is to provide a device of the above indicated character which shall be simple, durable and inexpensive in construction, and shall be adapted to be rigidly suspended from two points in such manner that it may be removed with facility.

Another object of my invention is to provide a gear case which mavbe economically manufactured and which shall embody improved suspension means whereby a tight joint between the cooperating halves thereof may be secured.

In the prior art, considerable difiiculty has been experienced with gear cases of this type, because of ill-fitting joints which have allowed the lubricant and grease to leak out, and have permitted dust and grit to work into the casing. I

Heretofore, it has been customary to provide the cooperating halves of a split gear case with projecting lugs which have been disposed on the respective sides of supporting members and secured thereto by suitable means. With this type of suspension and construction, it has been necessary to machine both sides of the supporting members, as well as the adjacent cooperating edges and surfaces of the gear case halves and projecting lugs. Furthermore, exact and skilful workmanship is required in order that a tight-fitting joint may be secured.

According to my present invention, I PTO-7 vide a gear case which is split in a substantially horizontal plane and is mounted in position upon two supporting members in such manner that a tight-fitting joint may be secured, as will be hereinafter set forth. In the accompanying drawing Figure 1 is an end elevation, partially in section, of a dynamo-electric machine and an associated gear case which is constructed and suspended in accordance with my invention, and Fig. 2 is a similar view, on a reduced scale, showing a modified method of suspension.

Referring to the drawings in detail, a dynamo-electric machine 1, having a bearing housing 2, is mounted upon a shaft 3 which carries a pinion 4. The pinion 4; meshes with a gear wheel 5, which is keyed to an axle 6, the pinion 4 and gear wheel 5 being inclosed in a suitable gear casing 7.

Although the dynamoelectric machine 1 is shown as a railway motor, it is only illustrative of any type of dynamo-electric machine and forms no part of my invention, except as it enters into an operative combination with the gear case 7. The bearing housing 2 may be of any well known type of construction and is provided with an integral'supporting member 8, itvbeing understood that the latter member may form a part of the motor frame, if desired.

A supporting member 9 constitutes an integral part of a removable axle cap 10 which is secured to the motor 1 in the usual manner. The gear case 7 comprises an upper half 11 and a lower half 12 which are fitted together on the line 13 in a substantially hori? zontal plane. The respective, ends of the upper half 11 are lugs 14 and 15, while the respective ends of the lower half 12 are provided with similar cooperating lugs 16 and 17.

In suspending the gear case 7 in position, as shown in Fig; 1, the right-hand portion thereof is supported by the projecting lugs 15 and 17 which rest upon the upper side of the supporting member 8, while the lefthand portion of the gear case is suspended on theprojecting lugs 14 and 16 from the supporting member 9. Bolts 1-8, or other suitable means are provided to secure the gear case parts together and to fasten them rigidly to the supporting members 8 and.9. Each half of the gear case is so constructed that the cooperating surfaces of the projecting lugs are in alinement with the cooperating edges of the case proper, so that these surfaces and edges may be machined at the same time, thus insuring a good joint, the

provided with projecting 8t? cooperating members of which may be drawn I together by the bolts 18 to any desired deree.

Assuming the gear case 7 to be suspended in position,'as shown in F1g. 1, the lower bai half 12 may be removed by removing the bolts 18 and withdrawing the lower portion diagonally to the left. The upper half 11 of the gear case 7 may be re oved in a somewhat similar manner, but, n account of its similarity to that hereinbefore set forth, no further description is considered necessary.

In Fig. 2, the gear-case 7 is constructed as hereinbefore described andis suspended at both ends below the supporting members 8 and 9 respectively. This mode of suspen-- 'sion may be preferable in some types of motors and under certain conditions, and it secures all of the advantages hereinbefore -mentioned. It is believed that those skilled half thereof, and two members for support:

in the art will experience no difliculty in understanding the method of removing the gear case halves and no description thereof will be given.

Although I have shown and described a gear case of specific structural details and means of suspension, it is evident that various modifications may be effected therein without exceeding the scope of my invention, and such modifications are intended to be covered by the appended claims.

I claim as my invention:

1. The combination with a gear case, of two supporting members therefor, one'end of said case being suspended from one of said supporting members and the other end thereof being supported upon the other supporting member.

2. The combination with a split gear case, of means for sup-porting one end thereof and for suspending the other end thereof.

3. The combination with a dynamo-elem 'tric machine, and a split gear case associated therewith, of a projecting member associated with said dynamo-electric machine to sup port one end of said gear case, and a second member from which the other end of said gear case is suspended.

, 4c. The combination with a gear case split substantially'in a horizontal plane, of a plurality of supporting members, one end of said case being suspended below one of said; supporting members and the other end there of being adapted to rest upon another supporting member.

5. The combination with a dynamo-electric machine having two projecting members associated therewith, of a gear case split substantially in a horizontal plane, one end of said case being suitably secured to the upper side of one projecting member and the other end thereof being secured to the under side of the other projecting member.

6. The combination with a railway motor having an integral projecting lug, and an axle cap for said motor having an integral copies of. this patent may be obtained for projecting lug, of a gear case comprising an upper and a tightly together on a substantially horizontal plane, single means for securing the corresponding ends of the upper and lower gear case portions together and for clamping them on one side of one projecting lug, and single means for securing the other corresponding ends of the upper and lower gear case portions together and for clamping them on one side of the other projecting member.

7. The combination with a gear case split substantially into halves and provided with projecting lugs at the respective ends of each ing said gear case at its respective ends, of means associated with each supporting member for clamping the projecting lugs intimately together and for securing them to the supporting members.

8. The combination with a gear case comprising complementary cooperating halves adapted to fit tightly together and provided with end lugs having their cooperating surfaces alined with the cooperating edges thereof, and two members for supporting said case at its respective ends, of clamping means associated with each supporting member for securing said gear case halves intimately together and for fastening said gear case to said supporting member.

9. The combination \v'itha dynamo-electric machine, a gear case associated therewith and comprising complementary halves adapted to fit tightly together, each half having two projecting lugs, the cooperating surfaces thereof being in the same plane with the cooperating edges thereof, and two supportng members located substantially at the respective ends of said gear case to which said gear casehalves are rigidly secured.

10. The combination with a gear case split substantially into halves and provided with projecting lugs at the respective ends of each half, and two members for supporting said gear case at its respective ends, of means 3 n a a assoclated with each supporting member and each corresponding pair of lugs for clampev ing said halves tightly together and for se curing said gear case to said supporting member, the correspondingly located lugs of each half being disposed on the same side of the associated supporting member.

In testimony whereof, I have hereunto subscribed my name this 28th day of Jan.

7 JAMES F. CURTIS. l Vitnesses Mrnns MAHONEY, B. B. HINES.

by addressing the Commissioner of Patents,

lower portion adapted to fit 

